Não informado. (1936). The Journal of Symbolic Logic. Association for Symbolic Logic.
Lua i Stíl Chicago (17ú heag.)Não informado. The Journal of Symbolic Logic. Pasadena, Calif: Association for Symbolic Logic, 1936.
Lua MLA (8ú heag.)Não informado. The Journal of Symbolic Logic. Association for Symbolic Logic, 1936.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.